/Engine/Source/Runtime/Engine/Classes/Engine/GameViewportClient.h
Each frame, the input system will update the motion data.
True to consume the motion event, false to pass it on.
virtual bool InputMotion ( [FViewport](API\Runtime\Engine\FViewport) * Viewport, int32 ControllerId, const FVector & Tilt, const FVector & RotationRate, const FVector & Gravity, const FVector & Acceleration )